Stomach exercise machine



FIG. 1 is a perspective view of the stomach exercise machine showing my present design,

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left plan view thereof;

FIG. 5 is a right plan view thereof;

FIG. 6 is a top view thereof; and

FIG. 7 is a bottom view; and,

FIG. 8 is a perspective view of the stomach exercise machine showing my present design in storage situation. 

The ornamental design for the stomach exercise machine, as shown and described. 